Reverend Billy and the Church of Stop Shopping is a radical performance community based in New York City. The Stop Shopping Choir is accompanied by a comic preacher, Reverend Billy, portrayed by performer William (Billy) Talen. The philosophy of the Church of Stop Shopping surrounds the imminent “Shopocalypse”, which assumes the end of humanity will come about through manic consumerism.

The Stop Shopping Choir accompanies Reverend Billy and stages guerrilla theater style actions, singing on the property of the Disney stores, Monsanto facilities, and Trump Tower, among others. They are often considered part of the Culture jamming movement.

https://en.wikipedia.org/wiki/Reverend_Billy_and_the_Church_of_Stop_Shopping